How does paedomorphosis been important to evolutionary diversification of salamanders?

Paedomorphosis has evolutionarily diversified salamanders by giving certain adults within a adult species juvenile characteristics while other adult species may not. When species mature they may adjust, or in some, metamorphose to/with environmental conditions. The difference between some species going through paedomorphosis and others not creates a broad variety of evolutionary paths, added to also by the later adjusting/metamorphing process mentioned before. When species retain many of the general features of their larval body form it could enhance the species' ability to survive.